Xim, ib txwm hu ua xim hauv Suav teb. Cov xim hu ua no yog pleev rau ntawm qhov chaw ntawm yam khoom uas yuav tsum tau tiv thaiv lossis kho kom zoo nkauj, thiab tuaj yeem tsim ib zaj duab xis txuas ntxiv mus rau yam khoom uas yuav tsum tau pleev.
Hydroxyethyl Cellulose yog dab tsi?
Hydroxyethyl cellulose (HEC), dawb los yog daj daj, tsis muaj ntxhiab, tsis muaj tshuaj lom fibrous lossis powdery khoom, npaj los ntawm etherification reaction ntawm alkaline cellulose thiab ethylene oxide (los yog chlorohydrin), yog cov Nonionic soluble cellulose ethers. Txij li thaum HEC muaj cov khoom zoo ntawm thickening, suspending, dispersing, emulsifying, bonding, zaj duab xis-forming, tiv thaiv noo noo thiab muab kev tiv thaiv colloid, nws tau dav siv hauv kev tshawb nrhiav roj, coatings, kev tsim kho, tshuaj, khoom noj, textile, papermaking thiab polymer Polymerization thiab lwm yam teb.
Yuav ua li cas thaum hydroxyethyl cellulose ntsib cov xim pleev xim dej?
Ua ib qho surfactant non-ionic, hydroxyethyl cellulose muaj cov khoom hauv qab no ntxiv rau thickening, suspending, binding, floating, film-forming, dispersing, water retention thiab providing protective colloid:
HEC yog soluble hauv dej kub lossis dej txias, kub siab lossis npau tsis muaj nag lossis daus, yog li nws muaj ntau yam solubility thiab viscosity yam ntxwv, thiab tsis yog thermal gelation;
Lub peev xwm khaws dej tau ob npaug ntawm methyl cellulose, thiab nws muaj kev tswj hwm dej zoo dua;
Piv nrog rau cov methyl cellulose thiab hydroxypropyl methyl cellulose uas tau lees paub, lub peev xwm ntawm HEC dispersing yog qhov phem tshaj plaws, tab sis lub peev xwm tiv thaiv colloid yog qhov muaj zog tshaj plaws.
Nws yog non-ionic thiab tuaj yeem nyob ua ke nrog ntau yam polymers, surfactants, thiab ntsev uas yaj hauv dej. Nws yog ib qho khoom siv colloidal thickener zoo heev rau cov kua electrolyte uas muaj concentration siab;
Yuav siv hydroxyethyl cellulose li cas? Yuav ntxiv nws li cas?
Ntxiv ncaj qha thaum lub sijhawm tsim khoom - txoj kev no yog qhov yooj yim tshaj plaws thiab siv sijhawm luv tshaj plaws.
Ntxiv dej huv rau hauv lub thoob loj uas muaj lub tshuab sib tov siab. Pib do tas li ntawm qhov ceev qis thiab maj mam lim cov hydroxyethyl cellulose rau hauv cov tshuaj kom sib npaug. Txuas ntxiv do kom txog thaum txhua yam khoom me me ntub. Tom qab ntawd ntxiv cov tshuaj preservatives thiab ntau yam khoom ntxiv. Xws li cov xim, cov khoom pab dispersing, dej ammonia, thiab lwm yam. Do kom txog thaum tag nrho cov hydroxyethyl cellulose yaj tag (qhov viscosity ntawm cov tshuaj nce ntxiv ntau) ua ntej ntxiv lwm yam khoom hauv cov mis rau kev ua tshuaj.
Nruab nrog niam dej cawv
Nws yog los npaj cov dej cawv niam nrog cov concentration siab dua ua ntej, thiab tom qab ntawd ntxiv rau cov khoom. Qhov zoo ntawm txoj kev no yog tias nws muaj kev ywj pheej ntau dua thiab tuaj yeem ntxiv ncaj qha rau cov khoom tiav, tab sis nws yuav tsum tau khaws cia kom zoo. Cov kauj ruam ntawm txoj kev no zoo ib yam li feem ntau ntawm cov kauj ruam hauv txoj kev 1; qhov sib txawv yog tias tsis tas yuav muaj lub tshuab ua kom siab, thiab tsuas yog qee lub tshuab ua kom muaj zog txaus los khaws cov hydroxyethyl cellulose sib npaug hauv cov tshuaj tuaj yeem txuas ntxiv mus yam tsis tau nres Do kom txog thaum yaj tag rau hauv cov tshuaj viscous. Txawm li cas los xij, nws yuav tsum tau sau tseg tias cov tshuaj fungicide yuav tsum tau ntxiv rau cov dej cawv niam sai li sai tau.
Vim tias cov hydroxyethyl cellulose uas tau kho saum npoo yog cov hmoov lossis cov khoom fibrous, Lihongde ceeb toom koj kom them sai sai rau cov ntsiab lus hauv qab no thaum npaj cov kua txiv hydroxyethyl cellulose:
(1) Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau do tas li kom txog thaum cov tshuaj tiav thiab meej.
(2) Nws yuav tsum tau maj mam sieve rau hauv lub tank sib tov, thiab tsis txhob muab ntau ntau lossis ncaj qha muab hydroxyethyl cellulose rau hauv lub tank sib tov.
(3) Qhov kub ntawm dej thiab PH hauv dej muaj kev sib raug zoo nrog kev yaj ntawm hydroxyethyl cellulose, yog li yuav tsum tau them sai sai.
(4) Tsis txhob ntxiv qee yam alkaline rau hauv qhov sib tov ua ntej cov hmoov hydroxyethyl cellulose raug tsau nrog dej. Kev tsa pH tom qab ntub dej pab kom yaj.
(5) Ntxiv cov tshuaj tua kab mob ua ntej kom ntau li ntau tau
(6) Thaum siv cov hydroxyethyl cellulose uas muaj viscosity siab, qhov concentration ntawm cov dej cawv niam yuav tsum tsis txhob siab tshaj 2.5-3% (los ntawm qhov hnyav), txwv tsis pub cov dej cawv niam yuav nyuaj rau kev tuav.
Lub sijhawm tshaj tawm: Lub Peb Hlis-02-2023